ESTIMATION OF SEISMIC LOADS AT PRE-SPLIT BLASTING

Authors

  • Victor Kamyansky Mining institute KSC RAS

DOI:

https://doi.org/10.25635/2313-1586.2018.02.082

Keywords:

numerical simulation, finite element method, rock failure, blast, contour blasting,, presplit blasting

Abstract

Based on results of numerical simulation the process of forming pre-split cracks at blasting of contour boreholes with different (air and water) gap has been studied. The radial and tangential stress field at the near zone of explosion has been investigated. It is hown, that when pre-split blasting method is used, the zone of discontinuity of the rock mass can achieve 5 meters at the direction of rock massive. The shielding effect of the pre-split blasting has been evaluated.

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Published

2018-06-16

Issue

No. 2 (17) (2018)

Section

DRILLING WORKS